package cn.hwl.springframework.core.io;

import cn.hutool.core.lang.Assert;

import java.net.MalformedURLException;
import java.net.URL;

/**
 * @author :  HuangWL
 * @date :    2022/4/27 11:20
 * 获取资源的实现
 * Q: location.substring(CLASSPATH_URL_PREFIX.length()
 */
public class DefaultResourceLoader implements ResourceLoader {
    @Override
    public Resource getResource(String location) {
        Assert.notNull(location,"Location must be not null");
        if (location.startsWith(CLASSPATH_URL_PREFIX)){
            return new ClassPathResource(location.substring(CLASSPATH_URL_PREFIX.length()));
        }else {
            try {
                URL url = new URL(location);
                return new UrlResource(url);
            }catch (MalformedURLException e){
                return new FileSystemResource(location);
            }
        }
    }
}
